Author: https://www.chinesestandard.net
Publisher: www.ChineseStandard.net
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 9

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Book Description
This document specifies the classification and requirements of screw threads used for spectacle frames, the length and tolerances of screws, the thread taps and measuring instruments. This document applies to small threads, ordinary threads and thread taps. This document does not apply to self-tapping screws.